A.W.
I can't remember having any breast tenderness, but if I did, it went away. Maybe your doctor cut the strings too short? I wouldn't worry about it just yet. I was told to check for strings after each "period". It takes a while to settle into place. After your next few periods, it will settle into place and you'll eventually have little or no periods. Just hang in there! :) I've had mine for 1.5 yrs.